Lenovo ThinkPad Edge E420 Hardware Maintenance Manual - Page 72
Backup battery
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Step 1 Screw (quantity) M2 × 3 mm, wafer-head, nylon-coated (1) Color Black Torque 0.181 Nm (1.85 kgfcm) 1090 Backup battery For access, remove these FRUs in order: • "1010 Battery pack" on page 56 • "1030 Bottom slot cover" on page 58 Table 17. Removal steps of backup battery DANGER Use only the battery specified in the parts list for your computer. Any other battery could ignite or explode. 3 2 1 When installing: Make sure that the connector is attached firmly. 66 Hardware Maintenance Manual
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Step
Screw (quantity)
Color
Torque
1
M2 × 3 mm, wafer-head, nylon-coated (1)
Black
0.181 Nm
(1.85 kgfcm)
1090 Backup battery
For access, remove these FRUs in order:
•
“1010 Battery pack” on page 56
•
“1030 Bottom slot cover” on page 58
Table 17. Removal steps of backup battery
DANGER
Use only the battery specified in the parts list for your computer. Any other battery could ignite or explode.
3
2
1
When installing:
Make sure that the connector is attached firmly.
66
Hardware Maintenance Manual